Labyrinth. David L. Ulin

A middle-aged man living in Los Angeles takes a business trip to San Francisco, where he lived, briefly but intensely, when he was just out of high school. Over the course of a long afternoon and evening, he confronts the echoes of his history in the patterns of the streets he obsessively wanders. A strange interaction with a couple of old friends brings him face-to-face with his unfinished past.